Test Tubes. Disposable and reusable, general-purpose glass and plastic test tubes suitable for a variety of laboratory applications. Products are available in various materials, volume capacities, and shapes, and may be sterile, non-sterile and/or autoclavable, and include caps. Test tubes are familiar items of glassware or plasticware found in most biological, chemical, and clinical research laboratories, schools, universities, and other industrial workplaces.